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US 10,374,742 B2Granted
Bidirectional optical communication with minimal guard band
AssigneeFinisar Corporation
InventorsLeo Yu-Yu Lin, Huiping Li, Youbin Zheng, Huade Shu, Li Zhang
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Abstract
A module, system and method adjusts a tunable filter to have an adjustable frequency response based on one of an outbound optical signal on a transmit channel and an inbound optical signal on a receive channel. The tunable filter is in an optical path of the outbound optical signal and in an optical path of the inbound optical signal. The transmit and the receive channels are configured as part of a channel plan of a bidirectional (bi-di) dense wavelength division multiplexing (DWDM) system.
Claims20
A communication module comprising:
- an optical transmitter configured to emit an outbound optical signal on a transmit channel;
- an optical receiver configured to receive an inbound optical signal on a receive channel;
- and
- a tunable filter in an optical path of the outbound optical signal and in an optical path of the inbound optical signal, the tunable filter configured for operation in an optical frequencies channel plan of a bidirectional (bi-di) dense wavelength division multiplexing (DWDM) system including at least first transmit and receive channels with a first guard band at a first frequency location therebetween and second transmit and receive channels with a different second guard band at a second frequency location therebetween, the tunable filter having an adjustable frequency response based on one of the first frequency location of the first guard band or the second frequency location of the different second guard band, the communication module configured to operate according to the optical frequencies channel plan including concurrent operation of the first transmit and receive channels having the first guard band therebetween and the second transmit and receive channels having the different second guard band therebetween.
1 more element
A method, comprising:
- adjusting a tunable filter in a communication module to have an adjustable frequency response based on one of an outbound optical signal on a transmit channel and an inbound optical signal on a receive channel, the tunable filter in an optical path of the outbound optical signal and in an optical path of the inbound optical signal, the tunable filter configured for operation in an optical frequencies channel plan of a bidirectional (bi-di) dense wavelength division multiplexing (DWDM) system including at least first transmit and receive channels with a first guard band at a first frequency location therebetween and second transmit and receive channels with a different second guard band at a second frequency location therebetween, the adjustable frequency response based on one of the first frequency location of the first guard band or the second frequency location of the different second guard band, the communication module configured to operate according to the optical frequencies channel plan including concurrent operation of the first transmit and receive channels having the first guard band therebetween and the second transmit and receive channels having the different second guard band therebetween;
- emitting the outbound optical signal on the transmit channel;
- and
- receiving the inbound optical signal on the receive channel.
1 more element
A system comprising:
- a communication module comprising:
- an optical transmitter configured to emit an outbound optical signal on a transmit channel;
- an optical receiver configured to receive an inbound optical signal on a receive channel;
- and
- a tunable filter in an optical path of the outbound optical signal and in an optical path of the inbound optical signal, the tunable filter configured for operation in an optical frequencies channel plan of a bidirectional (bi-di) dense wavelength division multiplexing (DWDM) system including at least first transmit and receive channels with a first guard band at a first frequency location therebetween and second transmit and receive channels with a different second guard band at a second frequency location therebetween, the tunable filter having an adjustable frequency response based on one of the first frequency location of the first guard band or the second frequency location of the different second guard band, the communication module configured to operate according to the optical frequencies channel plan including concurrent operation of the first transmit and receive channels having the first guard band therebetween and the second transmit and receive channels having the different second guard band therebetween;
- and
- a controller coupled to the tunable filter to configure the tunable filter to the adjustable frequency response.
4 more elements
Dependencies are inferred from the claim text.